我正在开发一个格式字符串漏洞实验室,我们给出了以下代码:
#define SECRET1 0x44
#define SECRET2 0x55
int main(int argc, char *argv[])
{
char user_input[100];
int *secret;
int int_input;
int a, b, c, d; /* other variables, not used here.*/
/* The secret value is stored on the heap */
secret = (int *) malloc(2*sizeof(int));
/* getting the secret */
secret[0] = SECRET1;
secret[1] = SECRET2;
printf("The variable secret's address is 0x%.8x (on stack)\n", &secret);
printf("The variable secret's value is 0x%.8x (on heap)\n", secret);
printf("secret[0]'s address is 0x%.8x (on heap)\n", …我正在尝试在针对我的Azure CosmosDb的F#脚本文件中测试一些不同的查询,但是当我尝试执行查询本身时,我收到有关丢失的DLL的错误.
我正在加载Documents.Client.dll:
#r "../packages/Microsoft.Azure.DocumentDB/lib/net45/Microsoft.Azure.Documents.Client.dll"
open Microsoft.Azure.Documents
open Microsoft.Azure.Documents.Client
open Microsoft.Azure.Documents.Linq
但是当我执行一个查询时:
Seq.toList <| query {
//some query that I copy & pasted from a working file
}
我收到此错误:
System.AggregateException: One or more errors occurred. ---> System.DllNotFoundException: Unable to load DLL 'Microsoft.Azure.Documents.ServiceInterop.dll': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
at Microsoft.Azure.Documents.ServiceInteropWrapper.CreateServiceProvider(String configJsonString, IntPtr& serviceProvider)
at Microsoft.Azure.Documents.Query.QueryPartitionProvider.Initialize()
at Microsoft.Azure.Documents.Query.QueryPartitionProvider.GetPartitionedQueryExecutionInfoInternal(SqlQuerySpec querySpec, PartitionKeyDefinition partitionKeyDefinition, Boolean requireFormattableOrderByQuery, Boolean isContinuationExpected)
at Microsoft.Azure.Documents.Query.DocumentQueryExecutionContextBase.<GetPartitionedQueryExecutionInfoAsync>d__0.MoveNext()
(堆栈跟踪中有更多 - 这只是它的顶部).
我无法在ServiceInterop任何地方找到dll - …
我正在尝试让我的Suave API接受CORS请求.我在这里关注了这个片段:
http://www.fssnip.net/mL/title/CORS-response-with-Suave
我将在这里重新创建:
let setCORSHeaders =
setHeader "Access-Control-Allow-Origin" "*"
>=> setHeader "Access-Control-Allow-Headers" "content-type"
let allow_cors : WebPart =
choose [
OPTIONS >=>
fun context ->
context |> (
setCORSHeaders
>=> OK "CORS approved" )
]
let webSite =
choose [
allow_cors
GET >=> OK "URLs are for wimps. GETting something? This is what you get."
]
但是现在我的端点需要传入令牌,并且由于CORS中缺少允许的头,这些端点会出错.我的令牌标题只是"令牌",所以我尝试了两件事,但都没有解决问题.
尝试#1
setHeader "Access-Control-Allow-Origin" "*"
>=> setHeader "Access-Control-Allow-Headers" "content-type"
>=> setHeader "Access-Control-Allow-Headers" "token"
这返回了一个错误,说content-type不再被接受 - 这似乎暗示最后一个setHeader覆盖了第一个,当你在这里查看源代码时:https://github.com/SuaveIO/suave/blob/master/src/Suave …
我有一个MVC应用程序,其中包含几个简单的页面,这些页面主要在Web API调用上运行.为简单起见,我想将它们包含在同一个项目中.我可以启动并导航到我的页面,但是当我尝试通过Ajax调用我的API时,我一直收到404错误 - 它无法找到API函数.
这是我的javascript文件:
$(document).ready(function () {
//set the login button to call our test API function
document.getElementById("login_submit").addEventListener("click", GetUser);
});
function GetUser() {
var response = $.ajax({
url: '/api/User',
method: 'GET',
contentType: 'application/json; charset=utf-8',
success: function (data) {
alert("Success!");
},
error: function (request, status, error) {
alert(error);
}
});
}
这是我的控制器:
namespace MyProject.Controllers.API
{
public class UserController : ApiController
{
// GET api/<controller>
[HttpGet]
public IEnumerable<string> Get()
{
return new string[] { "value1", "value2" };
}
// GET api/<controller>/5 …我需要能够构建一个.Include,将结果过滤到特定日期或之前创建的记录.我不会知道原始LINQ语句中对象的类型,我将找到它们(通过大量的箍,但这是有效的).
我有一个像这样的对象图:
A -> Ac
/ \
Bc <- B \
/ \
Cc <- C D -> Dc
对象Ac,Bc,Cc,和Dc都是动态发现的(也就是写原来的LINQ语句时,开发者没有键入这些关系).然后需要将它们添加到IQueryable表达式,并仅返回特定DateTime的值.
我尝试构建一个构造lambda并比较日期的函数.到目前为止,如果原始查询是A.Include(x => x.B).Include(x => x.B.Select(y => y.C),我可以构造字符串"A.B.Bc",所以我知道A,B和Bc的类型,以及它们的相关方式.
private static IQueryable<T> FilterChangeTrackerToDate<T>(this IQueryable<T> query, string includeString, DateTime targetDateTime)
{
var param = Expression.Parameter( typeof( T ), "x" );
var prop = Expression.Property(param, includeString + ".CreatedUtc");
var dateConst = Expression.Constant(targetDateTime);
var compare = Expression.LessThanOrEqual(prop, dateConst);
var lambda = …I am trying to instantiate a ZipArchive class in System.IO.Compression in an F# project:
open System.IO
open System.IO.Compression
open System.IO.Compression.FileSystem //this line errors, as expected
// Define your library scripting code here
let directoryPath = @"C:\Users\max\Downloads"
let dirInfo = new DirectoryInfo(directoryPath)
let zippedFiles = dirInfo.GetFiles()
|> Array.filter (fun x -> x.Extension.Equals(".zip"))
let fileStream = new FileStream(((Array.head zippedFiles).FullName), System.IO.FileMode.Open)
//this line does not compile, because ZipArchive is not defined
let archive = new System.IO.Compression.ZipArchive(fileStream)
I can create the same thing in …
保存新的F＃记录时，我Id@在RavenDb文档中获得了一个额外的列，当我在代码中加载或查看该对象时会显示该列；它甚至可以通过我的F＃API转换为JSON。
这是我的F＃记录类型：
type Campaign = { mutable Id : string; name : string; description : string }
我没有做任何令人兴奋的事情来保存它：
let save c : Campaign =
use session = store.OpenSession()
session.Store(c)
session.SaveChanges()
c
保存记录的新实例将创建ID为的文档campaigns/289。这是RavenDb中文档的全部价值：
{
"Id@": "campaigns/289",
"name": "Recreating Id bug",
"description": "Hello StackOverflow!"
}
现在，当我在C＃中使用相同的数据库（和文档）时，我没有获得额外的Id@价值。这是我在C＃中保存记录时的样子：
{
"Description": "Hello StackOverflow!",
"Name": "Look this worked fine",
}
（此外-“名称”与“名称”表示我的文档中有2个名称列。至少我理解该问题）。
所以我的问题是：在RavenDb中保存F＃记录时，如何摆脱Id@正在创建的额外属性？